Kantronics KPC-9612 Plus, Руководство пользователя

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Inside a TNC – the KPC-9612 Plus
To better understand the workings of your packet radio station, it is helpful to
have an overview of the major components of the TNC device at the center of
your station.
In the early days of packet radio, TNC’s consisted primarily of a modem for
communicating with a transceiver and a special-purpose microprocessor called a
PAD (i.e., packet assembler/disassembler), used to process packets of informa-
tion and communicate with a computer or terminal.
As packet radio has developed, more and more features have been added within
TNCs, including memory and software dedicated to a “Personal Bulletin Board
System” and, in some TNCs, support for paging. Also multi-port TNCs are now
available, to support more than one radio.
The following diagram shows the most important internal components of a
multi-port TNC, the KPC-9612 Plus, which supports two modems (port 1 and
port 2) and a header for a third device (port 3) that could also be a modem.
Note: Other Kantronics TNCs may have different features than the KPC-9612 Plus
(e.g., single-port rather than multi-port support, no support for paging).
Inside a TNC – the KPC-9612 Plus Introduction
KPC-9612 Plus v 8.2 27 User’s Guide